/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2022
     \\/     M anipulation  | Synthetik Applied Technologies
-------------------------------------------------------------------------------
License
    This file is a derivative work of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Class
    Foam::GaussianWeights

Description
    Collection of Gaussian weights

SourceFiles
    GaussianIntegrator.C

\*---------------------------------------------------------------------------*/

#ifndef GaussianWeights_H
#define GaussianWeights_H

#include "scalar.H"
#include "List.H"
#include "typeInfo.H"
#include "autoPtr.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
                        Class GaussianWeights Declaration
\*---------------------------------------------------------------------------*/

class GaussianWeights
{
public:

    // Binomial coefficient
    static scalar binCoeff(const scalar n, const scalar k);

    //- Calculate the weights and positions
    static void calcQuadrature
    (
        const label N,
        List<scalar>& ws,
        List<scalar>& xs
    );

    //- Set the weights and positions
    static void setQuadrature
    (
        const label N,
        List<scalar>& ws,
        List<scalar>& xs
    );
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //
